Lubricant compressor



Patented Mar. 5, 1929.

UNITED STATES PATENT'OFFICE.

EARL F. PIERCE, OF CHICAGO, ILLINOIS, ASSIGNOB ITO ALEMITE MANUFACTURING CORPORATION, 01 CHICAGO, ILLINOIS, A CORPORATION OF DELAWARE.

LUBRICANT cournnsson.

Application fil ed April 21,

My invention relates to improvements in lubricant compressors, and is particularly concerned with improvements in that type of lubricant compressor which is used for supplying lubricant under pressure to a pluralityof fittings, the compressor including a coupling member for successivelymaking sealed contact with the various fittings.

Compressors of the character described above are usually so constructed that thecou pling member can be detached from the barrel portion of the compressor so as to permit the escape of air therefrom during the filling flexible discharge conduit is connected to the compressor barrel in such manner that It need not be removed from the compressor barrel during the filling operation, but, never theless, permits the free dls'chargeof air from the compressor barrel.

Another object'of my invention is to provide a lubricant compressor having a dis charge conduit or coupling member connected therewith by a swivel connection, and in which a portion of thecompressor barrel itself acts as one oftheswivel members.

My invention further contemplates the provision of a lubricantcompressor, such as described above, which is simple in construction, economical to manufacture, and easy to operate.

Otherobjects of my'inventlonwill appear from timeto timeasthis descripltion progresses, referencebeing had to t e accompanying drawings, in which Figure lis aside elevation, partially in longitudinal section, of a compressor embodying myimpro vements Figure 2 is an enlarged sectional detail, and

Figure 3 is an exploded View, partially in longitudinal section andpartially in elevation. disclosing a modifiedform of my invention.

1924. Serial No: 708,001.

Referring to thedrawingsy and for the present to Figures land 2, I have illustrated my invention in combination with a compressor comprising the barrel5 havin the removable cap 6, through which extend s the 5 threaded piston rod 7 carrying the piston 8 at (its inner end, and the handle 9 at lts outer en At its opposite end, the barrel 5 is provided with an integral closure 10 having the tug bular extension 12 formedintegrally therewith. This extension has an singularly extending flange 13 provided with a central aperture for receiving the tubular portion 14 of the swivel member 15, which is rigidly 7 secured to the inner end oftlie fleatibledis charge conduit 16. p

The inner end of the tubular member 14is providedwith a head 17; between whichan'cl bottom of the cup leather 19 and asecond washer 20. t i

A compression spring 21 yieldingly holds the )arts just described infthe position shown in igures 1 and 2, so that the cup leatherl so efl'ectually prevents the escape of lubricant between the tubular member 14 and the adjacent portions of the compressor barrel.

At one point in its circumferencdthe opem ing which receives the tubular member 14, is 35 enlarged, asshown at22 (see Fig. 2 to ro vide an air vent. When it isdesire to 11 a compressor barrel, such asdescribedherein, the cap-6 is removed and theopenend ofth'e barrel is inserted in a supplyof lubricant, or pushed against the perforated follower of a lubricant can, which is now upon the market and well known to those skilled in thisart, and pressure is applied to the knurled portion of theswivelinember151n a direction town-(11 the supply of lubricant, whereupon the spring, 21 is compressed and thetubular member 14, the cup leather 19, and the associated parts move to the position shown in dotted'outline in Figure 2. thereby permitting air to escape from thecylinder 5 and lubricant to entert same. It will, of course, be understood that this air escapes through the air vent 22. Where it is desired to fill the compressor barrel by means of a knife, spatula, orother 05" similar implement, the ortion of the discharge conduit 16 immer iately adjacent the swivel member 15 can be rest-ed upon any suitable support, and by pressing downward- 1y upon the barrel 5, the user can cause the no parts just described to move to the position shown in Figure 2, thereby facilitating the discha ge of air from the bottom of the compressor.

parent that, in addition to providing means for facilitating the discharge of air from the compressor barrel during the filling operation, I have also provided a connection be tween the flexible conduit 16 and the compressor barrel which functions as a swive. This is desirable as it prevents twisting stresses being placed upon the conduit 16 while the compressor is in operation, and thereby materially lengthens the life of this conduit. 1 have illustrated this conduit as terminating in a coupling member 24, of well known construction, further description of which is unnecessary.

In some types of compressor, the coupling member 24- is connected directly to the barrel 5. Substantially the same result can be accomplished by my improved construction by connecting this coupling member 2a directly to the swivel member 15.

In Figure 3, I have illustrated a construction which permits the flexible conduit 16 to be easily and quickly attached to or do tached from the compressor barrel, and which, at the same time, functions as a swivel. In this modified form of my invention a pair of oppositely disposed spaced tongues 25, only one of which is shown in the drawings, are formed integrally with the tubular e tention 12 and then bent at right angles to the tubular extension and to the axis of the compressor, as shown in Figure 3, to provide means for receiving the head 18 of the swivel member 15, which is secured to the inner end of the flexible conduit 16. Preferably the tongues 25 are provided with slight projections 26 which engage the edge oi. the head 18 and tend to hold it in assembled re lation with the com ressor barrel when the iead 18 is received etween the tongues 25.

For sealing the connection between the swivel member 15 and the compressor barrel, I provide the thimble 27 which has formed integrally therewith the inner flange 28, having the central aperture 29 and the comparatively narrow outer flange 30. A gasket 31 of leather or other suitable material rests against the flange 30, and is yieldingly held thereagainst by means of the compression spring 32 confined between the flange 28 and the gasket 31. ll hen the swivel member 15' is connected with the compressor barre as described above, the spring 32 holds the central portion of the gasket 31 in ti ht contact with the head 18 of the swivel member '15, and thereby prevents the escape of lubricant between these two members. As pressure is applied to the lubricant by means of the screw threaded piston rod and the piston 8, this From the above description, it will'be appressure increases the sealing effect between the gasket 31 and the head 18.

When the operator desires to fill a compressor, constructed as shown in Figure 3, he removes the swivel member 15 therefrom, and then proceeds to till the compressor as described above, or in any other suitable way, and the air escapes through. the openings in the flange 28 and the gasket 31. l/Vhen the compressor has been refilled, the swivel 15 can be snapped into place, and the compressor is then ready ior further use. It will be seen that in this modified form of my invention, there is swivel connection between the member 15 and the compressor barrel, which serves the same function as that described in connection with Figures 1 and 2.

\Vhile I have described the details of construction of the preferred embodiment of my invention, it is to be clearly understood that my invention is not limited to these details, but is capable of other adaptations and modifications within the scope of the appended claims.

Having thus described my invention, What I claim is:

1. A lubricant compressor comprising a barrel, a swivel member formed integrally with said barrel, said member having a vent passage, a coupling member, and a swivel member connected with said coupling member and coac ting with the swivel member 011 said barrel to form a swivel connection between said coupling member and said barrel, said swivel members comprising means, when in one position, for permitting the escape of air from said barrel through said vent passage and, when in another position, preventing leakage from said barrel.

2. A lubricant compressor comprising a barrel, a discharge conduit, and means forming a connection between said discharge conduit and barrel permitting swivel movement without leakage, and manually operable to vent the system at the connection.

3. A lubricant compressor comprising compressing means, a discharge conduit, swivel members rotatable and axially slidable and connecting said conduit and compressing means, and venting means rendered operable by axial sliding movement of said swivel members.

1. A lubricant compressor comprising compressing means, a discharge conduit, swivel members connecting said conduit and c0mpressing means, and manually operable means for opening a vent passage at the swivel connection.

5. A lubricant compressor comprising a barrel, a discharge conduit for said barrel, and swivel means comprising two co-acting elements, one on said barrel and one on said discharge conduit, said swivel means permitting rotative movement between said conduit and said barrel, said co-acting elements being relatively reciprocable between two positions and permitting passage of lubricant from said barrel to said conduit in both positions and discharge from said barrel to the atmosphere only when in one of said positions.

6. A lubricant compressor comprising a barrel having a removable closure at one end, a closure for the other end having a tubular extension, an inwardly extending flange atthe outer end of said tubular extension, said flange formed to provide a vent opening, a

In witness whereof, I hereunto subscribe 

